Steam-engine



(No Model.)

J. T. WARNER.

STEAM ENGINE.

No. 410,866. I Patented Sept. 10, 1889.

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UNITED STATES PATENT OFFICE.

JAMES T. WARNER, OF MENDON, MASSACHUSETTS.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 410,866, dated SeptemberlO, 1889.

Application filed April 12, 1889- Serial No. 306,987. (No model.)

To all whom it may concern.-

Be it known that I, JAMES T. WARNER, of Mendon, in the county of NVorcester and State of Massachusetts, have invented certain new and useful Improvements in Steam-Engines, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to improvements in the construction of steam-engines and of the valves for regulating the admission of steam and the exhaustion thereof from the engine; and it consists in the peculiar and novel construction by which two cylinders are so connected together that one steamvalve will control the admission of steam to both cylinders, and two pistons are connected together so as to co-operate with each other.

It further consists in the peculiar and novel construction of the valve-operating mechanism, as will be more fully set forth hereinafter.

Referring to the drawings, Figure 1 is a side view of my improved steam engine. Fig. 2 is a plan view of the same. Fig. 3 is a sectional view of the same through the line A B. Fig. 4 is a view of the valve-locking device.

In the drawings similar numbers of reference indicate corresponding parts throughout The cylinders indicated by the numbers 6 6 are placed so that the axes of both are on a straight line. They are separated by the space 7, in which the butterfly-valve 8 is pivotally secured, so as to be readily swung to connect one cylinder after the other with the exhaustport 9.

The steam-supply pipe 10 delivers the steam into the steam-chest 11, consisting of a cylindrical space extending across the cylinders, in which spaceis a cylindrical valve having all but a conical section covering the inlet-port cut away, so that by a partial rotation of the steam-valve 12 steam is admit-ted to one of the cylinders and cut off at any desired point to expand in the cylinder.

The pistons 13 13 convey motion to the cross-heads 15 by means of the piston=rods 14 14, which form part of the cross headsand abut against the pistons, and these cross-heads are secured to or form part of the sidebars 16. The cross-heads 15 15 and side bars 16 16 form a rigid rectangular frame with the piston-rods 14, the piston-rods and the rectangular frame reciprocating together, supported on suitable slides, (indicated by the numbers 17.) In one, or, if desired, in both, of the piston-rods 14 14 the pin 18, or other suitable device for securing the connecting-rod, is fastened to transmit the reciprocating motion of the pistons 13 and the frame 15 16 to a crank or other means for changing the reciprocating into rotary motion.

The butterfly-valve Sis oscillated by the pin or finger 19, secured to one of the side bars 16, as shown in Figs. 1 and 2. The pin or finger 19 comes in contact with the arm 20, secured to the shaft of the butterfly-valve 8, so that near the end of the inward stroke of each piston the pin or finger 19 will come in con tact with the arm 20 and swing the butterflyvalve, so that the cylinder in which the piston moves will be connected with the steamport and disconnected from the exhaust-port, while the other cylinder will be disconnected from the steam-port and connected with the exhaust-port. The stem of the steam-valve 12 is provided with the cam 21. On the side bar 16, opposite to the one on which the pin or finger 19 is secured, are mounted to move therewith the uprights 22, supporting the cut-off rod 23, a part of which is provided with a screw threaded in opposite directions. On this right-and=left-hand screw 24 the tappets 25 are secured, the screw passing through threaded holes in the tappets. The tappets slide on the slotted way 26, and are provided with rounded proj eetions 27, extending below the way 26. By turning the wheel 28 in one direction the tappets 25 will be moved farther apart by means of the right-and-left-v hand screw 24, and by turning the wheel 28 in the opposite direction the tappets will be brought closer together. As these tappets 25 are used to close the steam-valve, the length of the admission of the steam to the cylinder can be regulated by the turning of the wheel 28. At each end of the slotted way 26 the levers 29 are hinged, each of said levers 29 bein g provided with an arm 30. WVhen the piston has reached nearly the end of the stroke, the arm 30 comes into contact with the corner 31 of the cam 21 and partially rotates the cam, and with it the steam-valve, thus opening the steam-port and admitting steam to one cylinder. The force of the steam moves the piston outward, and with it the rectangular frame 15 16, on which the valve-operating tappcts are mounted. The projection 27 of the tappet 25 encounters the fiat surface connecting the corners 31 31, and by turning the cam 21. partially again closes the steam-port, allowing the steam to expand, causing the piston to move its full distance of traverse, and with it the rectangular frame, by reason of the power exerted by the piston and the momentum acquired by the balancewheel of the engine, thereby causing the end of the rectangular frame in contact with the piston to move outward and the free end of the rectangular frame to be brought in con tact with its piston and carry it in position to be acted upon by the steam.

To hold the valve 12 in the closed position until it is about to be opened at or near the end of each stroke or reciprocation, I place against the valve-chest under the cam 21 the slotted locking-plate 32 and secure the same by two bolts. This plate has a segment of a circle cut from its upper edge, in which the corners 31 of the cam 21 can freely turn, the two ends of the plate being straight, so as to pass under the fiat side connecting the corners 31 of the cam 21, and thus hold the valve against rotation. \Vhen either one of the two uprights 22 near the end of the stroke reaches the locking-plate 32, it carries the same along and allows the cam to turn, carrying the opposite fiat side of the locking-plate under the cam, which, when turned by the projection 27 to close the valve, rests with its flat side on the flat side of the locking-plate, and thus holds the valve in closed position.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of the cylinders, the steam-valve, the lnitterfly-valve,the rectangular frame provided with the piston-rods, and mechanism, substantially as herein shown and described, for operating the valves.

2. The combination of the cylinders, the butterfly-valve, the steam-valve provided with the cam, the cut-off rod provided with the tappets, the levers, and the rectangular frame carrying the piston -rods, substantially as herein shown and described.

3. The combination of the cylinders 6 6, the butterfly-valve 8, provided with the arm 20, the steam-valve 12, having the cam 21 secured to the stem thereof, and the rectangular frame 16 16, carrying the piston-rods 14 14-, substantially as herein shown and described.

4 The combination of the cylinders 6 6, the butterfly-valve 8, provided with the arm 20, the steam-valve 12, having the cam 21 secured to its stem, the rectangular frame 16 16, carrying the piston-rods 14 14c and the finger 19, the cut-off rod 23, the tappets 25 25, and the levers 29 29, arranged and operating substantially as herein shown and described. 5. The combination of the cylinders 6 6, the butterfly-valve 8, provided with the arm 20, the steam-valve 12, having the cam 21 secured to its stem, the rectangular frame 16 16, carrying the piston-rods 14 14, the finger 19, and the uprights 22 22, supporting the slotted way 26, the cut-off rod 23, carrying the tappets 25 25 and supported on the uprights 22, and the levers 29 29, substantially as herein shown and described.

6. The combination of the cylinders 6 6, the butterfly-valve 8, provided with the arm 20, the steam-valve 12, having the cam 21 secured to its stem, the rectangular frame 16 16, carrying the piston-rods 14: 11, the finger 19, and the uprights 22 22, supporting the slotted Way 26, the cut-off rod 23, carrying the tappets 25 25 and supported on the uprights 22, the levers 29 29, and the lockingplate 32, substantially as herein shown and described.

JAMES T. \VARNER.

Witnesses:

M. F. Timon, J. A. MILLER, Jr. 

